#include "reg52.h"

typedef unsigned char u8;
typedef unsigned int u16;


sbit LED1=P2^0;
void delay_10us(u16 ten_us)
{
  while(ten_us--);
}
	
void main()
{
	
  while(1)
	{
	 LED1=0;
	 delay_10us(50000);
	 LED1=1;
	 delay_10us(50000);
	}
}
	